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2 Design Services & Project Management of Downtown Riverfront Implementation

July 31, 2020

on segments of the project when survey becomes available. VHB and the design team will rely
on the completeness and accuracy of the materials and data that are provided by HSI.

The primary objectives of the preliminary design are as follows:

e Define the limits of work so environmental permits and property agreements can be
developed in the next phase,

e Define all the proposed improvements to a level where cost estimating will be
meaningful, Se

e Preliminary cost estimating to ensure that the design program is affordable within the
available funding.

The products of the preliminary design will include 3D design plans developed to sufficient
detail to achieve the above objectives. This phase does not include detailed grading, stormwater
treatment or management, drainage or traffic studies or environmental testing.

lt is proposed that a mid-preliminary design reassessment will be conducted with involvement
trom the design team, City staff and HSI to ensure that the scope and fee in this amendment are
adequate and appropriately distributed and that the project is tracking as envisioned. Pending
important design decisions will be identified and the scope will be adjusted as appropriate. In
addition, consideration will be given to the project development and implementation process.
The construction management (CM) approach will be considered for portions or all the project,
and logical project component groupings will be evaluated. An alternative would be to bring in
a construction firm on an advisory basis at this stage to provide input on means and methods
and costs for the more complicated shoreline aspects of the project. This would likely be
beneficial as the project enters permitting.

Estimated Duration: 12 weeks

2.1 PHASE 2 - PRELIMINARY DESIGN

2.11 Phase 2 Initiation
VHB will organize a brief phase 2 kickoff meeting with City staff, HSI and design team leaders.
2.12 Preliminary Design Plans

It is anticipated that the overall project will be broken into sub-project areas that may or may
not proceed under differing schedules because of factors such as property impacts, permitting,
complexity, funding and delivery methods. During conceptual design the overall project was
broken into 17 project areas, or components as shown in the figures that follow. The preliminary
design scope of services for each project component is described in reference to the project
component numbering shown in the figures.

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VAG Design Services & Project Management of Downtown Riverfront Implementation
July 31, 2020

Project components west of Main Street:

Project Sub Areas
Pad nhmnecinernts te Pine Strest

Factery $5 Extension ininrgvements

Para dala & neat Fark
improvements. Revie Water St anc!
factory 3t Parking Layout.

Seu Buarhyelh & Aare

Renigvation to Bicentennial Park
Mew Scardwatk B Rarip lo tain St.
Multipurpose Poth Improvernents

Substation Serening

Boardyalh Connecter and loeting Dock

igs Potentral Trall anproverents f Nodes

SELy Potential Riverbank Enhancemenss

Boe Mew AGA Rang bo Cotton
Transfer dridne

Project Sub Areas

Riverfront Path around BAE Raptsee and Widen ADA Ramp

Rehad Ped Walkway on aridge

» Struttural Seardwalk, Rainp and Path

Southside Trail Imprevemients Ahematlve Route on Pearson Ave.)

July 34, 2020

Following are descriptions of the proposed scope of services specific to each project component
shown above.

2.12.1 - Factory St. Extension Ped Access to Pine Street

This task has evolved to include a new ped crossing on Pine Street with appropriate
pavement markings, signage and possibly flashing beacons. VHB will complete this
preliminary design. Minor streetscape modifications at the entrance to Factory Street
Extension that would give the appearance that the street is intended for pedestrians have
been considered, but the assumption at this time is that the area will not be improved until
after the redevelopment of the Picker Building since their plans are still pending.

Lead Project Team Consultant: VHB
Support from: Halvorson

2.12.2 - Redesign of Factory St Extension:

This area will include modifications to the existing Factory St Extension to better
accommodate pedestrians and bicyclists, but to continue to provide access for emergency
vehicles and maintenance operations. The improvemenis are expected to include lighting,
new pedestrian railings, planters and possibly dumpsier screening. The design does not
include an over-water section of path to preserve parking in the vicinity of Perk de la
Renaissance, but rather assumes that some parking will be displaced to make room fora
path connection, as discussed with the property owners.

Halvorson will do all the preliminary streetscape design reflecting on the conceptual
design images, and VHB will provide input on the railings and the roadway reconstruction
typical section. Detailed plans and grading are not included in this phase.

[t is assumed the design will not commence uniil the City obtains an answer from the
Millyard Associates on the disposition of the existing sewer line under the roadway since
that could affect the planned improvements. This scope of services does not currently
include sewer evaluation or design.

Lead Consultant: Halvorson
Support from: VHB

2.12.3 - Parc de la Renaissance Design and Water and Factory St Parking

The preliminary design in this area will include further development of the park design.
The design will include filling lands adjacent to Water Street to create an amphitheater,
new pathways, revised parking, waterfront plazas and landscape enhancements that
include planting, hardscape, street furnishings and lighting. This area may also be explored

ORDINANCE

AMENDED
O-16-019

INCREASING SEWER USE FEES RATES AND CHARGES

CITY OF NASHUA

In the Year Two Thousand and Sixteen

The City of Nashua ordains that Part II “General Legislation”, Chapter 255 “Sewerage
Disposal”, Article IX “Sewer Use Fees”, Section 255-63 “Rates and charges”, of the Nashua
Revised Ordinances, as amended, is hereby further amended by deleting the struck-through
language and adding the new underlined language as follows:

Ҥ 255-63. Rates and charges.

B. Demand charges.

Each user shall pay a quarterly or monthly demand charge
based on the size of the water meter serving the property. Quarterly and monthly
charges will be as follows:

Meter Quarterly Monthly

Size Charge Charge

(inches)

0.625 $27-77$31.94 $926-$10.65

O75 $55.55-$63.88 $48-52-$21.30

1 $220-86-$253.99 $73-62-$84.66

ds $440-39-$506.45 $146-80-$168.82

2 $4,240-54-$1.426.59 $443-50-$475.53

3 $2-752-42-$3.164.94 $914437-$1.054.98

4 $5505-57-$6.331.41 $4,835419-$2.110.47

6+ $13,764,58-$15.829.27 $4,58849-$5.276.42
C, Flow charge. In addition to the monthly or quarterly demand charge, each user

shall pay a flow charge for each 100 cubic feet of use measured by water meter
readings or wastewater flow meter readings. The flow charge per 100 cubic feet
will be $4.78-$2.05 through December 31, 204316. Effective January 1, 201417,
the flow charge per 100 cubic feet will be $2-05-$2.36.”

This legislation shall take effect on January 1, 2017.

"ATA. document A305'- 2020 Exhibit D

Contractor’s Past Project Experience

1 2 3 4
PROJECT NAME Norwell Home Lantheus Medical Barrier Wall Project MST Airplane Hangar-
Bathroom Renovations Metal Building Addition
PROJECT 12 Concord St, Nashua, | 331 Treble Cove Rd., 177 Main St., Littleton, | 100 Gerald Connors
LOCATION NH Billerica, MA NH Circle, Manchester NH
PROJECT TYPE Design Build Toilet Room Renovation] SSA Office Renovation | Design Build
Renovations
OWNER The Front Door Agency | Lantheus Medical General Service Manchester Schoold
Imaging Inc Administration District
ARCHITECT Matuszewski Architects | Robert Wironen Colby Engineering Matuszewski Architects
CONTRACTOR’S Duane Provencher Jack Schroeder Jack Schroeder Jack Schroeder
PROJECT
EXECUTIVE

KEY PERSONNEL

Mark True -General

Michael Gagnon -

Mark True - General

Joe Pation & Jake

Completion Date
12/20/2020

% Self-Performed Work
55

Completion Date
7/16/2018

% Self-Performed Work
45

Completion Date
4/18/2016

% Self-Performed Work
32

(include titles) Superintendent Superintendent Superintenedent Phillips- Superintendents
Randy Franco- Project
Manager
PROJECT DETAILS | Contract Amount Contract Amount Contract Amount Contract Amount
181,901. 358,916 1,035,590 234,110

Completion Date
6/30/2021

% Self-Performed Work
30

PROJECT L_] Design-bid-build CL] Design-bid-build CJ Design-bid-build CJ Design-bid-build
DELIVERY _] Design-build () Design-build CL) Design-build [>] Design-build
METHOD E] CM constructor EX] CM constructor —X] CM constructor LJ CM constructor
[] CM advisor L] CM advisor CJ CM advisor OO CM advisor
(_] Other: (] Other: () Other: LJ Other:
SUSTAINABILITY
CERTIFICATIONS

AIA Document A305” = 2020 Exhibit D. Capyright © 2020 by The American Institute of Architects. All rights reserved. The “American Institute of Architects,’
“AIA,” the AIA Lago, and “AIA Contract Documents* are registered (rademarks and may not be used without permission. This document was produced by AIA
software at 12:03:46 ET on 11/03/2021 under Order No.4399661920 which expires on 03/30/2022, is not for resale, is licensed for one-time use only, and may
only be used in accordance with the AIA Contract Documents® Terms of Service. To report copyright violations, e-mail copyright@ala.org.

User Notes: (SB8ADA40)

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Wo Design Services & Project Management of Downtown Riverfront Implementation
July 31, 2020

for potential flood mitigation (excavation) and a cantilevered overlook that would take
advantage of the prominent riverfront location. Halvorson will lead the complete Park
design. HL Turner will provide input on floodplain impact constraints. VHB will provide
preliminary roadway design for making Water Street one-way, including signal
moditications at the Water/Main Street intersection, and added parking on Factory Street.
It is assumed the City has approved the one-way direction on Water Street that was
presented during conceptual design.

Lead Consultant: Halvorsen
Support from: VHB, HLT

2.12.4 — 4 Water Street Cantilevered Boardwalk & Ramp:

This important sub area includes the exploration of a new cantilevered ramp that would
connect the lower Renaissance Park to the upper level Main Street and park. HL Turner
will lead the design. VHB will provide input on the boardwalk profile.

HL Turner will manage geotechnical efforts that will be required for the supports that are
planned in the river. HL Turner has provided an allowance estimate for all in-water
geotechnical needs including two boardwalks and the planned stage area in Park de fa
Renaissance.

VHB will provide a 3D terrestrial laser survey of all three buildings where boardwalks are
proposed along buildings. HL Turner requested this survey since they will need to know
exact elevations and locations of the building features including windows, foundations and
the like. The City will provide any required coordination with the building owner and
required property agreements.

Lead Consultant: HL Turner
Support from: VHB

2.12.5 ~ Renovation to Bicentennial Park:

Renovations to this small park adjacent to Main Street will include updates that refresh the
streetscape materials and furnishings to tie together the aesthetics of the Riverfront design
with the Park. The design will also include creation of an ADA compliant pedestrian
walkway to connect Main Street to the new boardwalk at 4 Water Street. The work does
not Include modifications to the existing railings or retaining walls.

Lead Consultant: Halvorson

2.12.6 - New Cantilevered Boardwailc:

Sen ght
weeny

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July 31, 2020

©

This important sub area includes the design of a new cantilevered boardwalk that would
connect Main Street to the proposed path in area 7. The boardwalk structure will match
the general design of the other proposed boardwalks, Conceptual evaluations point to a
structure that is entirely supported by the adjacent building without need for in-water
supports. The design will include a raised deck area behind the restaurant. HL Turner will
lead the design. VHB will provide input on the boardwalk profile and how and where it
touches down at the proposed paved path. VHB will provide the 3D terrestrial point cloud
survey. The City will provide any required coordination with the building owner and
required property agreements.

Lead Consultant: HL Turner
Support from: VHB

2.12.7 — Multiuse Path

VHB will design a multiuse path from the end of the boardwatk in area 6 to Front Street
and the boardwalk behind the substation. The existing unpaved path does not appear io
meet ADA requirements so VHB will propose profile improvements and an alignment shift
to avoid or minimize floodplain and wetland impacts.

Lead Consultant: VHB
Support from: HL Turner

2.12.8 — Substation Screening

Halvorson will complete the preliminary screening design. Halvorson and the City will interface
with Eversource.

Lead Consultant: Halvorson

2.12.9 - Boardwalk and Floating Dock

HL Turner will lead the design of a boardwalk connection along the river by the substation.
This boardwalk is an alternative to having the path run past the front of the substation
along Front Street. VHB will provide input on the boardwalk profile and how and where it
touches down at the proposed paved path and by the substation. We understand that HL
Turner will be providing bathymetry from FEMA, which will help them understand river
depths where the boardwalk will be over water. HL Turner will arrange geotechnical
services for the boardwalk supports.

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his Design Services & Project Management of Downtown Riverfront Implementation
July 31, 2020

The floating dock may or may not be accessed from the boardwalk, depending on grades
and available open water of sufficient depth to make it practical. An alternative to the dock
may be found in the terraced water's edge that is proposed under 2.12.10 below.

Lead Consultant: HL Turner
Support from: VAB

2.12.16 - Existing Trail Improvements

It is assumed that the existing paved path will suffice for the riverside path. This sub area
may include updates to the existing trail that would include trail furnishings, small plazas
for overlooks or pause places, and selected locations for public art. Based on recent
discussions with the city this will be a minimal effort.

This task also includes preliminary design of additional flood storage as mitigation for
proposed filling elsewhere. That would likely require shifting a portion of the path
alignment and possibly altering some parking. HL Turner will provide VHB with guidance
on flood storage needs.

Lead Consultant: VHB
Support from: HL Turner on flood storage needs

2.12.11 - Riverbank Restoration

The space between the river and the existing path along the north side of the river was
cleared by the City in 2020 and the City is conducting annual invasives and vegetation
control. At this stage we have assumed there is not a need for additional design work
along that rivet’s edge other than that discussed in 2.12.10 above, and no scope is
included in preliminary design.

2.12.12- ADA Accessible Ramp to Cotton Transfer Bridge

VHB structural engineers will complete the preliminary design for the ADA ramp. This will
include managing a boring and geotechnical subcontract to obtain the information
required to design the ramp supports. A detailed structural design scope is attached as an
exhibit.

Lead Consultant: VHB

2.12.13 - BAE Trail and Parking Modifications

VHB will develop the 3D design of the trail along the top of the riverbank and adjacent to
the BAE parking lot. VHB will coordinate with BAE since the design will likely have impacts

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Vi 1S Design Services & Project Management of Downtown Riverfront Implementation
July 31, 2020

to their parking or the parking spaces that they lease to Margaritas. VHB landscape
designers will also provide preliminary design jor the “parklet” near the PanAm bridge and
will design the railings and plantings along the path. VHB will work seek input from Lumen
and F&T on likely lighting design along the path and at the park. VHB will rely on the City
for negotiating any swapping of parking spaces or land between the City and BAE.

Lead Consultant: VHB

2.12.14 - PanAm Bridge Ped Walkway Rehabilitation

VHB’s initial assessment of the existing pedestrian walkway on the bridge is that the long
RR timbers that support the walkway may not meet current pedestrian loading guidelines.
VHB will reach out to PanAm to determine what their plans are for the bridge and to
obtain any records on the walkway construction and maintenance. To establish a definitive
determination on the structural adequacy of the supporting members it would be
necessary to perform a bridge inspection using a track mounted cherry picker type vehicle
that will allow VHB engineers to suspend under the walkway and the bridge to measure
the timbers and assess their condition. This would also require approval from PanAm and
obtaining one-time insurance coverage for the activities. An allowance for the track
mounted inspection vehicle and the railroad insurance is included tn this amendment. A
detailed structural design scope is attached as an exhibit.

Lead Consultant: VHB

2.12.15 - South Side Trail Improvements

VHB will develop the 3D design of the trail along the top of the riverbank. The presence of
asbestos will be assumed for the entire area, and VHB will design the improvements so
excavation will be limited. Techniques such as driven fence posts and light poles will be
explored. The design will not include tree plantings due to the steep slopes and asbestos
related restrictions. Our understanding ts that the City's landscape contractor will grind
stumps and loam and seed the slopes in the area in 2020. The need for additional
plantings is not known or included in this scope.

Lead Consultant: VHB

2.12.16 - ADA Ramp Replacement

VHB will design the replacement of the existing narrow steel pedestrian ramp with a 10
wide paved path on earth fill that is supported by a concrete block or similar retaining wall.
VHB will subcontract a geotechnical firm to obtain the necessary borings and geotechnical

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vio Design Services & Project Management of Downtown Riverfront implementation
July 31, 2020

recommendations. VHB will also coordinate with the City to ensure the new ramp will not
impact the existing sewer line in the area. A detailed structural design scope is attached as
an exhibit.

Lead Consultant: VHB

2.12.17 - 60 Main Street Boardwalk and Trail

HL Turner will lead the design for the boardwalk and associated ADA ramp that will
account for the elevation difference between Main Street and the parking lot behind 60
Main Street. VHB will provide input on the boardwalk profile and how and where it
touches down at the proposed paved path. HL Turner has determined that supports will
not be needed in the river and that the building will support the boardwalk. VHB will
provide a terrestrial point cloud survey.

VHB will provide design of the path than will lead along the river from the ADA ramp to
the ADA ramp behind the library. This path may result in utility pole and/or parking lot
impacts, and it should also be designed to minimize fill in the floodplain if possible.

The City will provide any required coordination with the building owner and required
property agreements.

Lead Consultant: HL Turner for the boardwalk, VHB for the trail

2.12.17a - Pearson Ave Alternative Connection

In the event the 60 Main Street boardwalk and path along the river described above are
found to be infeasible, VHB will direct fts attention and the associated design fee to an
alternative pedestrian connection along Pearson Street instead.

Lead Consultant: VAB

2.12.18 - Wayfinding

At the City’s direction wayfinding will be added to the scope of services during final
design.

lead Consultant: VHB

2.2, River Hydrology

Any of the design that would result in fill within the floodplain and floodway must be
coordinated with HL Turner since they will maintain the river hydraulics model.